Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 3

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  Dopamine
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Content available remote

Voltammetric determination of dopamine in the presence of ascorbic and uric acids using partial least squares regression: determination of dopamine in human urine and plasma

100%
Bahram M., Farhadi K., Arjmand F.
Open Chemistry
|
2009
|
vol. 7
|
issue 3
524-531
EN
A new differential pulse voltammetric method for dopamine determination at a bare glassy carbon electrode has been developed. Dopamine, ascorbic acid (AA) and uric acid (UA) usually coexist in physiological samples. Because AA and UA can be oxidized at potentials close to that of DA it is difficult to determine dopamine electrochemically, although resolution can be achieved using modified electrodes. Additionally, oxidized dopamine mediates AA oxidation and the electrode surface can be easily fouled by the AA oxidation product. In this work a chemometrics strategy, partial least squares (PLS) regression, has been applied to determine dopamine in the presence of AA and UA without electrode modification. The method is based on the electrooxidation of dopamine at a glassy carbon electrode in pH 7 phosphate buffer. The dopamine calibration curve was linear over the range of 1–313 μM and the limit of detection was 0.25 μM. The relative standard error (RSE %) was 5.28%. The method has been successfully applied to the measurement of dopamine in human plasma and urine. [...]
2
Publication available in full text mode
Content available

The circulatory levels of Serotonin and Dopamine and physical fitness factors in active and inactive men addicted to opium during rehabilitation

88%
Arazi H., Mollazadeh R., Dadvand S. S., Davaran M.
Physical Activity Review
|
2016
|
vol. 4
1-8
EN
Addiction to drugs is one of the significant problems in many countries. Opium is a kind of drug that its use goes back to many years ago. Dopamine and serotonin are neurotransmitters involved in the process of addiction. As a result, this study aimed to investigate the blood levels of serotonin, dopamine and physical fitness factors in active and inactive men addicted to opium during their rehabilitation period. This study is a descriptive and Causal after the occurrence. A total of 34 men addicted to opium referring to rehabilitation center had been admitted voluntarily as samples were available in the study. According to a questionnaire answered by them, 16 of them did exercise during their rehabilitation period (active group) and 18 of them did not do any physical activity during this period (inactive group). 5 cc of peripheral blood samples were obtained from both groups and were tested their aerobic capacity, muscular endurance, flexibility, body composition, blood pressure and heart rate. Statistical analysis showed that blood levels of serotonin and dopamine in active group were significantly more than inactive group (p<0.05). In addition, the active group compared with the inactive group had low body fat percent, more muscular endurance, more flexibility, and low resting heart rate (p<0.05). According to the findings, we can conclude that low physical activity but as regular walking can affect blood levels of serotonin and dopamine, and health-related fitness factors of addicted men and as a non-drug treatment is helpful.
3
Content available remote

Carbon nanotube-ionic liquid nanocomposite modified carbon-ceramic electrode for determination of dopamine in real samples

88%
Majidi M., Baj R., Naseri A.
Open Chemistry
|
2013
|
vol. 11
|
issue 7
1172-1186
EN
Room temperature 1-butyl-3-methylimidazolium tetraflouroborate ([BMIM][BF4]) ionic liquid was employed for dispersion of multi walled carbon nanotubes (MWCNTs) and the formation of nanocomposite on the surface of a carbon-ceramic electrode. The surface of the modified electrode was characterized using scanning electron microscopy and electrochemical impedance spectroscopy. The modified electrode exhibited excellent electrochemical activity to oxidation of dopamine (DA); whereas electro oxidation of ascorbic acid (AA) was not seen and electro oxidation of uric acid (UA) appeared at a more positive potential than DA. The multi walled carbon nanotube-ionic liquid nanocomposite modified carbon-ceramic electrode was used for the selective determination of DA in the presence of high levels of AA and UA using differential pulse voltammetry. The calibration curve for DA was linear in the range of 3.00 to 130 µM with the detection limit (S/N=3) of 0.87 µM. The present electrode was successfully applied to the determination of DA in some commercial pharmaceutical samples and human blood serum. [...]
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.